[U-Boot] [PATCH v3 1/4] imx: mx6slevk: Add I2C1 support

[Li Ye-B37916]

Hi Stefano,

On 9/12/2014 6:08 PM, Stefano Babic wrote:
> Hi Ye,
>
>
> On 11/09/2014 05:13, Ye.Li wrote:
>> Add I2C1 pin and pad settings, and enable the MXC I2C driver.
>>
> I see two different topics in this patch:
>
> 1. Add I2C1 pins to mx6sl pins. This is general, and not related to a
> specific board.
>
> 2. Add I2C1 support to 6slevk board, as in subject.
>
> Please spliut this patch to address ewach related issue.
>
> Thanks,
> Stefano Babic
>
>> Signed-off-by: Ye.Li <B37916 at freescale.com>
>> ---
>> Changes since v1:
>> - None
>>
>> Changes since v2:
>> - None
>>
>>  arch/arm/include/asm/arch-mx6/mx6sl_pins.h |    5 +++++
>>  board/freescale/mx6slevk/mx6slevk.c        |   26 ++++++++++++++++++++++++++
>>  include/configs/mx6slevk.h                 |    6 ++++++
>>  3 files changed, 37 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/include/asm/arch-mx6/mx6sl_pins.h b/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
>> index 045ccc4..ac84270 100644
>> --- a/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
>> +++ b/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
>> @@ -34,5 +34,10 @@ enum {
>>  	MX6_PAD_FEC_REF_CLK__FEC_REF_OUT			= IOMUX_PAD(0x424, 0x134, 0x10, 0x000, 0, 0),
>>  	MX6_PAD_FEC_RX_ER__GPIO_4_19				= IOMUX_PAD(0x0428, 0x0138, 5, 0x0000, 0, 0),
>>  	MX6_PAD_FEC_TX_CLK__GPIO_4_21				= IOMUX_PAD(0x0434, 0x0144, 5, 0x0000, 0, 0),
>> +
>> +	MX6_PAD_I2C1_SDA__I2C1_SDA					= IOMUX_PAD(0x0450, 0x0160, 0x10, 0x0720, 2, 0),
>> +	MX6_PAD_I2C1_SDA__GPIO_3_13					= IOMUX_PAD(0x0450, 0x0160, 5, 0x0000, 0, 0),
>> +	MX6_PAD_I2C1_SCL__I2C1_SCL					= IOMUX_PAD(0x044C, 0x015C, 0x10, 0x071C, 2, 0),
>> +	MX6_PAD_I2C1_SCL__GPIO_3_12					= IOMUX_PAD(0x044C, 0x015C, 5, 0x0000, 0, 0),
>>  };
>>  #endif	/* __ASM_ARCH_MX6_MX6SL_PINS_H__ */
>> diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c
>> index a990b4c..fedd5c3 100644
>> --- a/board/freescale/mx6slevk/mx6slevk.c
>> +++ b/board/freescale/mx6slevk/mx6slevk.c
>> @@ -13,12 +13,14 @@
>>  #include <asm/arch/sys_proto.h>
>>  #include <asm/gpio.h>
>>  #include <asm/imx-common/iomux-v3.h>
>> +#include <asm/imx-common/mxc_i2c.h>
>>  #include <asm/io.h>
>>  #include <linux/sizes.h>
>>  #include <common.h>
>>  #include <fsl_esdhc.h>
>>  #include <mmc.h>
>>  #include <netdev.h>
>> +#include <i2c.h>
>>  
>>  DECLARE_GLOBAL_DATA_PTR;
>>  
>> @@ -37,8 +39,29 @@ DECLARE_GLOBAL_DATA_PTR;
>>  #define SPI_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_SPEED_MED | \
>>  		      PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
>>  
>> +#define I2C_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_PUE |            \
>> +	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
>> +	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
>> +	PAD_CTL_ODE | PAD_CTL_SRE_FAST)
>> +
>>  #define ETH_PHY_RESET	IMX_GPIO_NR(4, 21)
>>  
>> +#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
>> +
>> +/* I2C1 for PMIC */
>> +struct i2c_pads_info i2c_pad_info0 = {
>> +	.sda = {
>> +		.i2c_mode = MX6_PAD_I2C1_SDA__I2C1_SDA | PC,
>> +		.gpio_mode = MX6_PAD_I2C1_SDA__GPIO_3_13 | PC,
>> +		.gp = IMX_GPIO_NR(3, 13),
>> +	},
>> +	.scl = {
>> +		.i2c_mode = MX6_PAD_I2C1_SCL__I2C1_SCL | PC,
>> +		.gpio_mode = MX6_PAD_I2C1_SCL__GPIO_3_12 | PC,
>> +		.gp = IMX_GPIO_NR(3, 12),
>> +	},
>> +};
>> +
>>  int dram_init(void)
>>  {
>>  	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
>> @@ -162,6 +185,9 @@ int board_init(void)
>>  #ifdef	CONFIG_FEC_MXC
>>  	setup_fec();
>>  #endif
>> +
>> +	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info0);
>> +
>>  	return 0;
>>  }
>>  
>> diff --git a/include/configs/mx6slevk.h b/include/configs/mx6slevk.h
>> index 3d05a64..bf5066f 100644
>> --- a/include/configs/mx6slevk.h
>> +++ b/include/configs/mx6slevk.h
>> @@ -60,6 +60,12 @@
>>  #define CONFIG_PHYLIB
>>  #define CONFIG_PHY_SMSC
>>  
>> +/* I2C Configs */
>> +#define CONFIG_CMD_I2C
>> +#define CONFIG_SYS_I2C
>> +#define CONFIG_SYS_I2C_MXC
>> +#define CONFIG_SYS_I2C_SPEED		  100000
>> +
>>  /* allow to overwrite serial and ethaddr */
>>  #define CONFIG_ENV_OVERWRITE
>>  #define CONFIG_CONS_INDEX		1
>>
>
I will split this patch to two in v4.

Best regards,
Ye Li